Yakovlev Yak-15
1946
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Yakovlev Yak-15

Flown for the first time on 24 April 1946, just three hours after the Mikoyan-Gurevich OKB's I-300 (MiG-9), the Yak-15 was to achieve the distinction of being one of only two service jet fighters in aviation's annals to have been derived from a piston-engined service fighter (the other being the Swedish Saab 21R). Primarily the responsibility of Yevgenii Adler and Leon Shekhter, development of the Yak-15 began in May 1945, the all-metal second-generation Yak-3 airframe being used as a basis and enabling the first of three prototypes to be completed in the following October. Taxying trials and short "hops" were performed, but flight testing was delayed while the possibility of the jet efflux attaching to the fuselage at high incidences was explored in the TsAGI T-101 full-scale wind tunnel. The Yak-15 retained most of the wing, rear fuselage, tail and undercarriage of the Yak-3, a new fuselage nose housing a Junkers Jumo 004B turbojet being introduced, and the main-spar being arched over the jetpipe. The Yak-15 was demonstrated over Tushino during Aviation Day on 18 August 1946, and two days later, on 20 August, the NKAP (People's Commissariat for the Aircraft Industry) issued a directive that 12 additional aircraft be built to participate in the October Revolution Parade to be held on the following 7 November, 80 days later. Produced by hand, the first of these flew on 5 October and the last in time to participate in the Parade, which, in the event, was cancelled because of inclement weather. State Acceptance testing was completed in May 1947, and, despite being structurally limited to Mach=0.68 below 3200m, the Yak-15 was ordered into production at GAZ 153 as an interim type. One of the pre-series Yak-15s had meanwhile been adapted as a tandem two-seat conversion trainer under the designation Yak-21. The series Yak-15 carried an armament of two 23mm NS-23 cannon and was powered by a Jumo 004B turbojet which had been adapted by I F Koliesov of the Lyulka bureau for manufacture at Kazan as the RD-10 with a rating of 892kg. Production gave place late in 1947 to the Yak-17 after completion of 280 Yak-15s. Max speed, 435 mph (700km/h) at 8,200 ft (2 500 m), 500 mph (805km/h) at 16,405 ft (5 000 m). Time to 16,405 ft (5 000 m), 4.8 min. Max range, 317mls (510 km). Empty weight, 5,1811b (2 350 kg). Loaded weight, 6,0291b (2 735kg). Span, 30 ft 2V4in (9,20m). Length, 28 ft 6V2 in (8,70 m). Height, 7 ft 5Vs in (2,27m). Wing area, 159.85 (14,85m2).

Yakovlev Yak-15


Specification 
 WEIGHTS
    Take-off weight2735 kg6030 lb
    Empty weight2350 kg5181 lb
 DIMENSIONS
    Wingspan9.2 m30 ft 2 in
    Length8.70 m29 ft 7 in
    Height2.27 m7 ft 5 in
    Wing area14.85 m2159.84 sq ft
 PERFORMANCE
    Max. speed805 km/h500 mph
    Ceiling12500 m41000 ft
    Range510 km317 miles

3-View 
Yakovlev Yak-15A three-view drawing (1627 x 1273)

Comments
Paul Scott, 08.05.2016

As Don Shively says, an amazing fit of contrition by the then Labour/Attlee British government in giving the soviets the Nene engine. Ok, it may have given them the best head-start in giving them a few years' worth of advancement, but I'm sure espionage and/or further development of German axial-flow engines would bear fruit for them.

Johan Runfeldt, 09.05.2011

About the sale of the Nene. They were sold to the Soviets with the prerequisite that they would be for civilian use only. But Stalin wasn't the guy to keep a promise if he could benefit from breaking it, and like his late revolutionary buddy Lenin said: Promises are like pie-crust, made for breaking. So it wasn't treason of a Briton as much as betrayal from the Soviets that landed the Nene in fighters like the MiG-15 and bombers like the Il-28.

Nwana, 22.01.2011

@Don.
The traitor you're looking for was Kim Philby(Harold Adrian Russell Philby (Ambala (India) 1 - 1 - 1912 Moscow (Soviet-Union) 11 - 5 - 1988). He has, alive and well, received a high award from Brezhnev.

mike jonson, 14.07.2010

Is there anny were in the U.S you can see one of these?

Don Shively, 15.03.2010

You have to admit, the Russians beat us out with the sheer number of jets by producing this fighter. An F-80 might have shot it out of the sky but 80 Yak 15's surely would have been a problem for us. Recall our Sherman tank and the German Tiger. It is interesting how a fake "dog fight" between an F-86 and a Me 263 (owned by Howard Hughes) was turned DOWN by the USAF for fear the old German plane would have won the fight! Too bad the English sold the Neene engine to the Ruskies. It cost a lot of lives. Did they ever catch the traitor who did that? Don

The_Stealth_Owl, 05.01.2010

Plane can even combat F-86

Don Shively, 09.11.2009

Ya gotta admit...suddenly the skies were full of Russian jets were we had just a few!

Charles, 15.05.2009

Don, you must consider the all up weight : that's the answer.

Don Shively, 31.03.2007

How would the Yak 15 with the German motor stand up to our F-80 or the Gloster jet?

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